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(No Model.)

F. D. F. MULLER. AIR TIGHT CHAMBER IN VESSELS.

No. 405,792. Patented June 25, 1889'.

INVENTOH WITNESSES A TTOR/VEU mlllllgqfl lfqf frl illllll N. PETKRS.Phowmho hur. Waihmgiom D. c.

UNITED STATES PATENT OFFICE.

FRIEDRICH D. F. MULLER, OF NEIV YORK, N. Y.

AIR-TIGHT CHAMBER lN VESSELS.

SPECIFICATION forming part Of Letters Patent No. 405,792, dated June 25,1889. Application filed October 2,1888. Serial No. 236,988. (No model)To all whom it may concern:

Be it known that I, FRIEDRICH D/F. MiiL- LER, of the city, county, andState of New York, have invented certain new and useful Improvements inVessels, of which the follow ing is a specification.

The object of my invention is to provide certain new and usefulattachments to marine vessels for the purpose of rendering themunsinkable in case of collision, explosion, or any like mishap.

The invention consists in the construction and combination of parts anddetails, as will be fully described and set forth hereinafter, andfinally be pointed out in the claims.

In the accompanying drawings, Figure 1 represents a side view of avessel provided with my improvements, parts being broken out. Fig. 2 isan enlarged cross-sectional view of the vessel provided with my improvedattachment. Fig. 3 is a horizontal sectional view, parts being brokenout and the under side of the different decks being shown. Fig. t is adetail sectional view showing the aircocks for the tanks.

Similar letters of reference indicate corresponding parts.

The ceilings A, which are secured to the decks B of the vessel 0 in theusual manner, are composed of cork sheets or plates from one to twoinches in thickness, said cork sheets serving for the purpose ofincreasing the buoyancy of the ship and to assist in floating the samein case it springs a leak or in case it in any other way becomespartially filled with water. To the under sides of the decks I secure,by means of suitable fastening-strips or other suitable device,sheet-metal air and water tight tanks 'D, which nearly cover the entireceiling. The said air-tanks are made fiat,

so as to reduce the clear space between the decks as little as possible.In order to protect said tanks froin the efiects of entering shot orshell, V-shaped or similar strong deflecting-plates E are secured to theinner surface of the sides of the hull along each side of the decks. Inthe saloon decks and cabins, which would be disfigured by theflatair-t-anks D, the cornices F are made hollow and constructed ofsheet metal, so that they serve as air-tanks for increasing the buoyancyof the ship. The said cornices are enlarged, so as to increase theirair-storing capacity. The center-pieces H are also made hollow and airand water tight, so as to serve as air-tanks.

On men-of-war the shock caused by the firing of cannon might compressand rupture the air-tanks, and to avoid this said tanks are providedwith air-pipes M, having cocks N, which can be opened while firing, sothat the air compressed by the shocks can escape from the tanks.

The floors on the deck-beams are made of wood or metal in the usualmanner. In case the ship springs a leak or collides with another and thewater enters, the air contained in the several air-tanks, and also thecork plates, will have sufficient carrying-power to keep the shipafloat, and Will prevent its sinking.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A marine vessel provided with air-tight tankslocated at the corners and ceilings of the cabins and saloons and shapedto form cornices and center-pieces, substantially as set forth.

2. The combination, with a marine vessel, of flat air-tight tankssecured to the under sides of the decks and V-shaped deflectingplatessecured to the hull of the vessel along the edges of the decks andpartially covering said tanks, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

FRIED, D. F. MULLER.

IVitnesses:

PAUL GoEPEL, CARL KARP.

